Revert postscript code removal.

core/fxcodec/codec/ccodec_faxmodule.h

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_FXCODEC_CODEC_CCODEC_FAXMODULE_H_
 #define CORE_FXCODEC_CODEC_CCODEC_FAXMODULE_H_
 
 #include <memory>
 
+#include "core/fxcrt/fx_memory.h"
 #include "core/fxcrt/fx_system.h"
 
 class CCodec_ScanlineDecoder;
 
 class CCodec_FaxModule {
  public:
   std::unique_ptr<CCodec_ScanlineDecoder> CreateDecoder(const uint8_t* src_buf,
                                                         uint32_t src_size,
                                                         int width,
                                                         int height,
                                                         int K,
                                                         bool EndOfLine,
                                                         bool EncodedByteAlign,
                                                         bool BlackIs1,
                                                         int Columns,
                                                         int Rows);
+#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
+  static void FaxEncode(const uint8_t* src_buf,
+                        int width,
+                        int height,
+                        int pitch,
+                        std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf,
+                        uint32_t* dest_size);
+#endif
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_FAXMODULE_H_